<?php

/*
	Question2Answer (c) Gideon Greenspan

	http://www.question2answer.org/

	
	File: qa-include/qa-ajax-click-answer.php
	Version: See define()s at top of qa-include/qa-base.php
	Description: Server-side response to Ajax single clicks on answer


	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.
	
	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	More about this license: http://www.question2answer.org/license.php
*/

require_once QA_INCLUDE_DIR . 'qa-app-cookies.php';
require_once QA_INCLUDE_DIR . 'qa-app-format.php';
require_once QA_INCLUDE_DIR . 'qa-app-users.php';
require_once QA_INCLUDE_DIR . 'qa-db-selects.php';
require_once QA_INCLUDE_DIR . 'qa-page-question-view.php';
require_once QA_INCLUDE_DIR . 'qa-page-question-submit.php';


//	Load relevant information about this answer

$answerid = qa_post_text('answerid');
$questionid = qa_post_text('questionid');

$userid = qa_get_logged_in_userid();

list($answer, $question, $qchildposts, $achildposts) = qa_db_select_with_pending(
    qa_db_full_post_selectspec($userid, $answerid),
    qa_db_full_post_selectspec($userid, $questionid),
    qa_db_full_child_posts_selectspec($userid, $questionid),
    qa_db_full_child_posts_selectspec($userid, $answerid)
);


//	Check if there was an operation that succeeded

if (
    (@$answer['basetype'] == 'A') &&
    (@$question['basetype'] == 'Q')
) {
    $answers = qa_page_q_load_as($question, $qchildposts);

    $question = $question + qa_page_q_post_rules($question, null, null, $qchildposts); // array union
    $answer = $answer + qa_page_q_post_rules($answer, $question, $qchildposts, $achildposts);

    if (qa_page_q_single_click_a($answer, $question, $answers, $achildposts, false, $error)) {
        list($answer, $question) = qa_db_select_with_pending(
            qa_db_full_post_selectspec($userid, $answerid),
            qa_db_full_post_selectspec($userid, $questionid)
        );


        //	If so, page content to be updated via Ajax

        echo "QA_AJAX_RESPONSE\n1\n";


        //	Send back new count of answers

        $countanswers = $question['acount'];

        if ($countanswers == 1)
            echo qa_lang_html('question/1_answer_title');
        else
            echo qa_lang_html_sub('question/x_answers_title', $countanswers);


        //	If the answer was not deleted....

        if (isset($answer)) {
            $question = $question + qa_page_q_post_rules($question, null, null, $qchildposts); // array union
            $answer = $answer + qa_page_q_post_rules($answer, $question, $qchildposts, $achildposts);

            foreach ($achildposts as $key => $achildpost)
                $achildposts[$key] = $achildpost + qa_page_q_post_rules($achildpost, $answer, $achildposts, null);

            $usershtml = qa_userids_handles_html(array_merge(array($answer), $achildposts), true);

            $a_view = qa_page_q_answer_view($question, $answer, ($answer['postid'] == $question['selchildid']) && ($answer['type'] == 'A'),
                $usershtml, false);

            $a_view['c_list'] = qa_page_q_comment_follow_list($question, $answer, $achildposts, false, $usershtml, false, null);

            $themeclass = qa_load_theme_class(qa_get_site_theme(), 'ajax-answer', null, null);


            //	... send back the HTML for it

            echo "\n";

            $themeclass->a_list_item($a_view);
        }

        return;
    }
}


echo "QA_AJAX_RESPONSE\n0\n"; // fall back to non-Ajax submission if something failed


/*
	Omit PHP closing tag to help avoid accidental output
*/